Cita APA (7a ed.)

Darwin, C. (1872). The origin of species: By means of natural selection or the preservation of favoured races in the struggle for life (6th ed.). John Murray.

Cita Chicago Style (17a ed.)

Darwin, Charles. The Origin of Species: By Means of Natural Selection or the Preservation of Favoured Races in the Struggle for Life. 6th ed. London: John Murray, 1872.

Cita MLA (9a ed.)

Darwin, Charles. The Origin of Species: By Means of Natural Selection or the Preservation of Favoured Races in the Struggle for Life. 6th ed. John Murray, 1872.